Spring nights

Much poetic fuss is made over hot summer nights and stark winter nights, but seldom are the nights of spring exalted beyond the arrival of the spring peeper tree frogs (the pinkletink to Islanders, or Hyla crucifer by Linnaeus's reckoning). However, Spring days and nights in New England have spectacularly clear air as well. It is related to the crystal clarity of late Fall, but the arctic wind flow necessary to cleanse the air in Fall makes it too cold to enjoy for very long. In Spring, the air feels not so much frozen as freshly thawed. I'm always depressed on the first May or June day where the dry heat and quick-cooling clarity of Spring air is replaced by the humidity of summer.
I was driving home from work a few nights ago and the moon (waxing crescent, according to the SunCult plugin for Firefox) looked amazing. Though only a small part of the moon was illuminated by the sun, the air was so clear and still that the darkened bulk of the Earthside moon was also dimly visible. It was also a late Spring day last year when I drove my in-laws out to Mt. Wachusett; the air was so clear it was like you could reach out and touch Boston, 50 miles distant. The next day summer broke, and the air wasn't that clear again until October.